Discussion on Low-carbon Design of Underground Expressway Transportation System

Underground expressway is becoming very hot in the construction of urban traffic system.The advantages and applicable conditions for expressway transportation system located under ground,on ground and over ground are presented and discussed respectively in this paper.By comparing their merits,the underground expressway transportation system shows great application prospect in construction of energy conservation and environmental protection transportation system.Energy saving measures of the underground expressway is analyzed from design technology of the structure,ventilation,lighting,pavement materials and exhaust dust recovery.Some concrete measurements of energy conservation are drawn out for underground expressway transportation system.For these aspects of design and constructing,the low carbon design strategies are discussed,and the key research fields for the low carbon design of underground expressway are pointed out.